\(S.I = \frac{P\times R\times T}{100}\)
\(280=\frac{56000\times R\times 2}{100}\)
\(R= \frac{280}{560\times2}=\frac{1}{4}\)
= \(0.25\)
Therefore, \(0.25\%\) gives Rs \(280\) as interest on the given sum.
Read more: Simple Interest